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Career

Grunberg has had guest roles in television starting 1990. From 1998-2002 he appeared as Sean Blumberg on Felicity. He appeared from 2001-2006 as Eric Weiss on Alias. He left that series as a regular to star on the NBC sitcom, Grand Union. Since 2003, Abrams had planned a series called The Catch about a bounty hunter, starring Grunberg in the lead role. Suggested for both the 2004–2005 and 2005–2006 seasons, the series was never produced; however, a pilot episode was shot. Abrams also cast Grunberg in a brief role as the pilot for the 2004 series Lost. Grunberg returned for the first-season finale, but his scenes were cut for time, and were instead included on the season 1 DVD set. He also appeared in a small role in Mission: Impossible III, which Abrams directed.

Grunberg has a major role in the NBC TV show Heroes. He plays police officer Matt Parkman, who has the power of telepathy. Grunberg has also guest starred on House. He was offered a part in Star Trek, which Abrams directed, but was unable to take it because of a conflict with another project he is working on (he did, however, provide the voice for Kirk's stepfather in the opening sequence).[1] Grunberg voices FBI agent Ethan Thomas in the video game Condemned: Criminal Origins.

Outside of acting, Grunberg is known as one of the creators of the popular Yowza iPhone application, which combines coupon codes with GPS navigation.[2]

In 2009, Grunberg launched Talk About It, a Web site dedicated to epilepsy education and awareness, featuring many of Greg's co-stars and celebrity friends, including Garner, Larter, Pasdar, Ramamurthy, Ventimiglia, Panettiere, as well as Zachary Quinto, Chris Pine, Dr. Drew Pinsky, Ron Rifkin, and John Mayer. More stars will be added in the coming weeks and months. The site features Grunberg interviewing top epilepsy experts on the need to talk more about epilepsy, and includes a section for people all over the world to talk about it.

While appearing on G4's Holiday Hit List in 2003, Grunberg stated he is the only man in Hollywood with four g's in his name.

Grunberg's older brother Brad is also an actor, sometimes billed as "Johnny Cocktails".[5]